Hi,
Do you have any such clause in your Association bylaws that members will be removed without any explanation if they default in making the membership fee?
Whether the association is registered or unregistered?
Providing a warning notice is very easy, but without knowing the background of your association, a proper warning notice cannot be provided by us.
Instead of sending a warning notice, call all the members for a common meeting, explain all about the hardship faced by the Association in the absence of membership dues by certain members. Get a declaration from those defaulters that if they fail to make the payment on or before ______, they agree with any action initiated by the association, including the association expelling them out of the association. It would be a bit tough to get such direct letters, but somehow convince them either to make the payment or leave to ensure the smooth operation of the association.